BLOCKEDSERVERS Blocklist (RBL)
BLOCKEDSERVERS is a blocklist where senders can request removal from this blacklist through a manual delisting form after an IP lookup.
Updated on 17 Jun 2026: We added clearer lookup, delisting, and prevention steps for BLOCKEDSERVERS listings.
Summarize with
Check if you are listed on BLOCKEDSERVERS Blocklist (RBL)
And 143 other blocklists.
Spamhaus
0Spam
Cisco
NoSolicitado
URIBL
abuse.ro
ALPHANET
Anonmails
Ascams
BLOCKEDSERVERS
Calivent Networks
EFnet
JustSpam
Kempt.net
NordSpam
RV-SOFT Technology
Scientific Spam
Spamikaze
SpamRATS
SPFBL
Suomispam
System 5 Hosting
Team Cymru
Validity
www.blocklist.de Fail2Ban-Reporting Service
ZapBL
2stepback.dk
Fayntic Services
ORB UK
technoirc.org
TechTheftSpamhaus0SpamCiscoNoSolicitadoURIBLabuse.roALPHANETAnonmailsAscamsBLOCKEDSERVERSCalivent NetworksEFnetJustSpamKempt.netNordSpamRV-SOFT TechnologyScientific SpamSpamikazeSpamRATSSPFBLSuomispamSystem 5 HostingTeam CymruValiditywww.blocklist.de Fail2Ban-Reporting ServiceZapBL2stepback.dkFayntic ServicesORB UKtechnoirc.orgTechTheftSpamhaus0SpamCiscoNoSolicitadoURIBLabuse.roALPHANETAnonmailsAscamsBLOCKEDSERVERSCalivent NetworksEFnetJustSpamKempt.netNordSpamRV-SOFT TechnologyScientific SpamSpamikazeSpamRATSSPFBLSuomispamSystem 5 HostingTeam CymruValiditywww.blocklist.de Fail2Ban-Reporting ServiceZapBL2stepback.dkFayntic ServicesORB UKtechnoirc.orgTechTheftSpamhaus0SpamCiscoNoSolicitadoURIBLabuse.roALPHANETAnonmailsAscamsBLOCKEDSERVERSCalivent NetworksEFnetJustSpamKempt.netNordSpamRV-SOFT TechnologyScientific SpamSpamikazeSpamRATSSPFBLSuomispamSystem 5 HostingTeam CymruValiditywww.blocklist.de Fail2Ban-Reporting ServiceZapBL2stepback.dkFayntic ServicesORB UKtechnoirc.orgTechTheftSpamhaus0SpamCiscoNoSolicitadoURIBLabuse.roALPHANETAnonmailsAscamsBLOCKEDSERVERSCalivent NetworksEFnetJustSpamKempt.netNordSpamRV-SOFT TechnologyScientific SpamSpamikazeSpamRATSSPFBLSuomispamSystem 5 HostingTeam CymruValiditywww.blocklist.de Fail2Ban-Reporting ServiceZapBL2stepback.dkFayntic ServicesORB UKtechnoirc.orgTechTheftWhat is BLOCKEDSERVERS blocklist (RBL)?
The BLOCKEDSERVERS Blocklist (RBL) is an IP-based DNS blocklist (DNSBL) for IP addresses suspected of sending spam, scanning, or other abusive email traffic. Mail server administrators can use this blacklist to filter, score, or reject incoming mail from listed sources.
The operators publish examples for both direct DNSBL use and weighted scoring. In a Postfix example, rbl.blockedservers.com is used with reject_rbl_client, which means a receiving server can reject listed IPs during SMTP. In the policyd-weight example, BLOCKEDSERVERS has a score of 1.25 and is combined with other signals before a spam threshold is reached. The real impact depends on how the receiving server has configured its mail policy.
Technically, the main DNSBL zone is rbl.blockedservers.com. A lookup reverses the IPv4 address and appends that zone, so 203.0.113.7 is checked as 7.113.0.203.rbl.blockedservers.com.
Who runs BLOCKEDSERVERS blocklist (RBL)?
The blocklist is run by an organization named BLOCKEDSERVERS. Public information about the organization is limited, but the website publishes live listing statistics, API examples, and service status for several zones.
Alongside rbl.blockedservers.com, the public status page lists netscan.rbl.blockedservers.com, spam.rbl.blockedservers.com, and torexit.rbl.blockedservers.com as running. Check the exact zone named in the bounce message before you assume a removal request for the main zone covers the listing.
How to check a BLOCKEDSERVERS listing
Start with the sending IP address shown in the bounce message or mail log. Do not check the domain unless the rejection text names a domain-based list, because BLOCKEDSERVERS is an IP blacklist.
DNS lookup examplebash
# Replace 203.0.113.7 with your sending IP dig +short 7.113.0.203.rbl.blockedservers.com
If the query returns an address, the IP is listed. If it returns no answer, check the original bounce for the exact RBL zone and make sure the sending IP was copied correctly. Some receiving servers cache DNSBL results, so delivery can take time to recover after a delisting.
- Confirm the sending IP in the SMTP transcript or outbound mail logs before you submit a removal request.
- Check whether the bounce names rbl.blockedservers.com or a related zone such as spam.rbl.blockedservers.com.
- Record the timestamp and recipient server that rejected the mail so you can verify whether the rejection stops after removal.
How do I get removed and delisted from BLOCKEDSERVERS blocklist (RBL)?
BLOCKEDSERVERS provides a self-service removal path through its website. Look up the affected IP address, confirm the exact zone, and use the removal form shown for that listing. Fix the cause first; delisting without cleanup usually leads to another listing.
- Review your mail logs to find the spam source, such as a compromised user account, vulnerable web application, malware infection, or unexpected outbound sender.
- Secure the affected systems by changing passwords, applying patches, disabling exposed scripts, and confirming the mail server is not an open relay.
- Check the sender domain's SPF, DKIM, and DMARC setup, plus reverse DNS and MX records, because recipient filters often review those signals alongside RBL listings.
- Use Suped's DMARC reporting to identify unauthorized sources using your domain while you clean up SPF and DKIM configuration.
- Request delisting only after the issue is fixed, then recheck the exact DNSBL zone and retry delivery after DNS cache timing has passed.
What's the impact of being listed on BLOCKEDSERVERS blocklist (RBL)?
The impact of a BLOCKEDSERVERS listing ranges from low to moderate, depending on the receiver. The list is less widely referenced than the largest public DNSBLs, but a receiver using reject_rbl_client can block mail from a listed IP outright.
In the policyd-weight example published by the operators, a listing on rbl.blockedservers.com carries a score of 1.25. That is lower than several other entries in the same configuration, but it still adds reputation weight. If the IP also has spam complaints, poor authentication, missing reverse DNS, or listings on other blocklists or blacklists, BLOCKEDSERVERS can contribute to a final reject or junk decision.
Other BLOCKEDSERVERS blocklists
BLOCKEDSERVERS Netscan Blocklist
Organization
BLOCKEDSERVERS
Zone
netscan.rbl.blockedservers.com
Type
IP
Impact
Low
Delisting
Manual
BLOCKEDSERVERS Spam Blocklist
Organization
BLOCKEDSERVERS
Zone
spam.rbl.blockedservers.com
Type
IP
Impact
Low
Delisting
Manual
BLOCKEDSERVERS Torexit Blocklist
Organization
BLOCKEDSERVERS
Zone
torexit.rbl.blockedservers.com
Type
IP
Impact
Low
Delisting
Manual
